supercharger questions

[GT40Mustang]

i just got a vortech supercharger kit and im planning on running 5 - 8 psi and i wanted to know what fuel upgrades need to be done ... right now i have a stock fuel pump in the car with 19 pound injectors ,i already know that i need a 12:1 fmu and also planning on getting a wide band a/f gauge

 

[1BIGMOFO]

What year is the car? What else is done to the car? Is the bottom end stock? H/C/I?

 

[GT40Mustang]

short tube headers, stock cam, ported gt40 upper and lower with 70mm tb

 

[1BIGMOFO]

Im not by any means a s/c guy but im 100% sure you will need to upgrade the fuel system. I would say at least 255lph pump and at least 30# injectors but like i said im not an experienced s/c guy and i would rather you ask someone that really knows.. Let me look threw my friend list and find out who the best person to ask would be.... BRB

 

[1BIGMOFO]

PM dsblk93gt he really knows his shit. Im sure he wouldnt mind helping you and pointing you in the right direction.

 

[vorstang]

you will need a bigger fuel pump, adjustable fuel pressure regulator, at least 24 lb injectors as long as you keep the boost low, but if your going 10 lbs or more go bigger, you'll need a ignition box like MSD or equivalent. a bigger mass air and T- body would help to.

 

[4'dforever]

I ran 6lbs. with 155 in tank pump, fmu, msd boost retard, adj. fuel pressure reg. Full exhaust on a lowered '91 GT vert with an automatic on 17" BFG comp t/a ZR tires. Can ran a 13.2 @104 all day long. Absolutely nothing done to the engine. That was with a Powerdyne!

 

[1BIGMOFO]

^ Not bad ^

 

[dsblk93gt]

I ran 6lbs. with 155 in tank pump, fmu, msd boost retard, adj. fuel pressure reg. Full exhaust on a lowered '91 GT vert with an automatic on 17" BFG comp t/a ZR tires. Can ran a 13.2 @104 all day long. Absolutely nothing done to the engine. That was with a Powerdyne!

My 93 GT, 5spd, Powerdyne 7lbs (9lb kit), FMU, stock fuel pump, exhaust, with 3.27 gears 12.77@111 with a 1.9 60ft.

Stock regulator is fine, no real need for an adjustable one unless you are trying to run 30lbers or something without an FMU and have to crank the FP.

Ive never used a BTM, you are better off saving money and getting a chip really to set timing that way.

If $$ is tight..
12:1 FMU, 255 fuel pump (GSS 342 I think is the correct one), 1 heat ranger cold plugs gapped .028-.035, 9-10* timing initial with 93 pump gas.

If you have the $$...42lbers, larger MAF (LMAF 90mm, etc.), and a custom burned chip.

A wideband would be a good investment! They are $200-400 depending what one you get. I'd get one with datalogging ability though.

 

[4'dforever]

I'd love to take and use that advice, but that was was better than 15 years ago that I had that setup.(wow i'm getting old) Present '90 LX is stock and will probably stay that way.

 

[dsblk93gt]

I'd love to take and use that advice, but that was was better than 15 years ago that I had that setup.(wow i'm getting old) Present '90 LX is stock and will probably stay that way.

The rest was more less towards the OP but thats ok!

 

[GT40Mustang]

where does the mass air meter go?

 

[1990_LX]

It replaces the stock one....unless you have a speed density system. What year is your car?

 

[GT40Mustang]

1987 but i did a mass air swap and my s/c kit didnt come with a mass air meter

 

[1F8LBITE]

currently im running an S-trim on my car ( was hittin 12-13 psis before i spun the belt) i have 30l bers, mallory regulator ( adjustable) and a vortech fmu with a 255 pump in the tank. car runs prettty frigin good. i just got a set of rails im gonna throw on soon